Please look in Eschmeyer's Catalog of Fishes for authorships of sections, Families of Fishes (all), and related information.

Species in the genus Huso: [ 131 ] records

aculeatus, Acipenser Lovetsky [A.] (ex Fischer) 1834:262, Pl. 19 (fig. 2) [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Dnjepr River in Jekaterinoslaw/Yekaterinoslav Province, Russia. [Original as "Fluvius Borysthenes. Sed uti videtur, locis restrictis Gubern. Catherinoslawl."] •Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952], Jouladeh-Roudbar et al. 2020:14 [ref. 37983]). •Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

acutirostris, Acipenser gueldenstaedtii var. Antipa [G.] 1909:262, Pl. 20 (fig. 107) [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Danube River, Romania. Appeared as Acipenser Güldenstaedtii var. acutirostris. Treated by Kottelat 1997 as infrasubspecific. Not available. Junior homonym of Acipenser acutirostris Ayres 1854. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). •In the synonymy of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). 1°Homonym. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

alba, Acipenser ruthenus var. Antipa [G.] 1909:249, Pl. 31 (fig. 93a) [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Romania. No types known. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Infrasubspecific. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

albinea, Acipenser ruthenus var. Brusina [S.] 1902:64 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Sava at Rugvice; Kupa at Siska, Croatia. No types known. Original not seen. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Infrasubspecific. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

albula, Acipenser Forster [J. R.] 1767:354 [Philosophical Transactions of the Royal Society of London v. 57 (art. 33); ref. 18088] Volga River, Russia. No types known. Not available, as named alternative for Acipenser beluga Forster 1767. See Acipenser beluga Forster 1767. •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

aleutensis, Acipenser Fitzinger [L. J. F. J.] in Fitzinger & Heckel 1836:285 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Canaga Island, Aleutian Islands, Alaska, U.S.A. [in error]. No types known. Based on "Acipenser rutheno affinis" Pallas 1814:107 [ref. 3351]. See Mecklenburg et al. 2002:115 [ref. 25968] who say not from Alaska and not transmontanus. •Questionably a synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). •Synonym of Acipenser transmontanus Richardson 1837 -- (Scott & Crossman 1998:100 [ref. 24570]). •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

anasimos, Acipenser (Huso) Duméril [A. H. A.] 1870:122 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] St. Louis, Missouri, U.S.A. Holotype (unique): MCZ (whereabouts unknown). •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

anthracinus, Acipenser (Huso) Duméril [A. H. A.] 1870:126, Pl. 15 (figs. 4, 4a-b) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Lake Erie, North America. Syntypes: MNHN 0000-9096 (1, dry), 0000-9112 (1, dry). Type catalog: Bertin 1940:251 [ref. 293]. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570] as athracinus). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

atelaspis, Acipenser (Huso) Duméril [A. H. A.] 1870:141 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Saskatchewan River, Canada. Holotype (unique): MCZ (whereabouts unknown). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

baerii, Acipenser Brandt [J. F.] 1869:115 [Mélanges biologiques v. 7; ref. 618] Ob and Lena river systems, Siberia, Russia. Syntypes: whereabouts unknown. For remarks on systematics see Kottelat 2006:15 [ref. 28831] •Valid as Acipenser baerii Brandt 1869 -- (Berg 1948:86 [ref. 12882], Coad 1995:6 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Zhu 1995:5 [ref. 25213] as baeri, Chereshnev 1996:598 [ref. 24659] as baeri, Coad 1996:84 [ref. 25304] as baeri, Bemis et al. 1997:37 [ref. 22871], Sokolov 1997:47 [ref. 24690] as baeri, Reshetnikov et al. 1997:725 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760] with subspecies, Sokolov 1998:19 [ref. 23571], Dyer 2000:89 [ref. 26678] as baeri, Bogutskaya et al. 2001:42 [ref. 26178], Zhang 2001:36 [ref. 26586], Mecklenburg et al. 2002:115 [ref. 25968], López et al. 2003:7 [ref. 27366] as cf. baerii, Sideleva 2003:8 [ref. 27815] as baerii with subspecies, Hanel 2003:47 [ref. 27894], Menni 2004:71 [ref. 28131] as cf. baerii, Bogutskaya & Naseka 2004:22 [ref. 28183] with subspecies, Kottelat 2006:15 [ref. 28831], Ocock et al. 2006:26 [ref. 28933], Kottelat & Freyhof 2007:50 [ref. 29996], Mecklenburg et al. 2011:117 [ref. 31212], Ruban et al. 2011:471 [ref. 31229], Hilton et al. 2011:136 [ref. 31407], Dolgov 2013:915 [ref. 33112], Parin et al. 2014:40 [ref. 33547], Litz & Koerber 2014:5 [ref. 33622] as baeri, Mirande & Koerber 2015:8 [ref. 35117] as baeri, Zhang et al. 2016:44 [ref. 34477] as baeri, Nión et al. 2016:24 [ref. 35565], Romanov et al. 2017:820 [ref. 35687], Dolgov et al. 2018:35 [ref. 41055], Esmaeili et al. 2018:6 [ref. 36089], Ćaleta et al. 2019:143 [ref. 37026], Lorenzoni et al. 2019:251 [ref. 37108], Dyldin et al. 2020:78, 102 [ref. 37569], Jouladeh-Roudbar et al. 2020:13 [ref. 37983], Çiçek et al. 2022:4 [ref. 38985], Dyldin et al. 2022:[8] [ref. 39193], Çiçek et al. 2023:328 [ref. 40625], Loureiro et al. 2023:178 [ref. 40506], Çiçek et al. 2024:26 [ref. 40789]). •Valid as Sterletus baerii (Brandt 1869) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso baerii (Brandt 1869) -- (Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso baerii (Brandt 1869). Acipenseridae. Distribution: Northeastern Asia: Ob' River to Kolyma River, Arctic rivers of Siberia (Russia). Introduced elsewhere. Habitat: freshwater, brackish.

baicalensis, Acipenser stenorrhynchus var. Nikolskii [A. M.] 1896:401 [Ezhegodnik Zoologicheskogo Muzeya Imperatorskoy Akademii Nauk v. 1; ref. 14614] Lake Baikal, Siberia, Russia. Syntypes: MLSU 1631 (1), ZIN 10641 (2). •Synonym of Acipenser baerii Brandt 1869 -- (Berg 1948:86 [ref. 12882], Kottelat 2006:15 [ref. 28831]). •Synonym of Acipenser baerii Brandt 1869, but a valid subspecies baicalensis Nikolskii 1896 as described -- (Reshetnikov et al. 1997:726 [ref. 24702], Sokolov 1998:20 [ref. 23571], Sideleva 2001:45 [ref. 26181], Sideleva 2003:8 [ref. 27815], Ocock et al. 2006:26 [ref. 28933], Romanov et al. 2017:820 [ref. 35687], Dyldin et al. 2020:102 [ref. 37569], Jouladeh-Roudbar et al. 2020:13 [ref. 37983]). •Synonym of Huso baerii (Brandt 1869). Current status: Synonym of Huso baerii (Brandt 1869). Acipenseridae. Habitat: freshwater, brackish.

baschmakovae, Acipenser ruthenus ruzskyi natio Johansen [B. G.] 1946:173 [Trudy Tomskogo Gosudarstvennogo Universiteta v. 97; ref. 19607] Infrasubspecific and unavailable; from Narym, Ob R. basin, Siberia, Russia. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Infrasubspecific. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

beluga, Acipenser Forster [J. R.] 1767:354 [Philosophical Transactions of the Royal Society of London v. 57 (art. 33); ref. 18088] Volga River, Russia. No types known. Not available, as named alternative as Acipenser albula or A. beluga. See Acipenser albula Forster 1767. •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

birostrata, Acipenser ruthenus var. Brusina [S.] 1902:65 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Croatia. Original not seen. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Infrasubspecific. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

brevirostris, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:298 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Name only, not available. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). •In the synonymy of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Nomen Nudum. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

brevirostris, Acipenser ruthenus var. Antipa [G.] 1909:250, Pl. 31? (fig. 94) [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Objectively invalid if treated as available, preoccupied by Acipenser brevirostrum Lesueur 1818. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable; from Danube R. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Infrasubspecific. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

brevirostrum, Acipenser Lesueur [C. A.] 1818:390 [Transactions of the American Philosophical Society (New Series) v. 1 (art. 33); ref. 17515] Delaware River, U.S.A. Holotype: ANSP 16953 (mounted specimen). Additional material: (1). Type catalog: Böhlke 1984:17 [ref. 13621]. As Acipenser brevirostrus in some early literature; but apparently treated as a noun in apposition by current workers. •Valid as Acipenser brevirostrum Lesueur 1818 -- (Lee et al. 1980:38 [ref. 22416], Smith 1986:44 [ref. 22186], Robins & Ray 1986:46 [ref. 23100], Scott & Scott 1988:65 [ref. 25518], McAllister 1990:40 [ref. 14674], Burkhead & Jenkins 1991:342 [ref. 21804], Page & Burr 1991:25 [ref. 18983], Musick et al. in Jenkins & Burkhead 1994:185 [ref. 21581], Artyukhin 1995:7 [ref. 23782], Bemis et al. 1997:37 [ref. 22871], Murdy et al. 1997:54 [ref. 23144], Birstein & Bemis 1997:159 [ref. 29760], Scott & Crossman 1998:80 [ref. 24570], Musick et al. 2000:10 [ref. 24959], Musick in Collette & Klein-MacPhee 2002:83 [ref. 26158], Scott 2003:671 [ref. 26987], Nelson et al. 2004:58 [ref. 27807], Scharpf 2005:6 [ref. 28940], Page & Burr 2011:134 [ref. 31215], Hilton et al. 2011:11 [ref. 31407], Page et al. 2013:58 [ref. 32708], Kynard et al. 2016:209 [ref. 35295], Robins et al. 2018:41 [ref. 35886], Page et al. 2023:48 [ref. 40505]). •Valid as Sterletus brevirostrum (Lesueur 1818) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso brevirostrum (Lesueur 1818) -- (Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso brevirostrum (Lesueur 1818). Acipenseridae. Distribution: Western Atlantic: Atlantic coast from New Brunswick, Canada to northern Florida, U.S.A. Habitat: freshwater, brackish, marine.

buffalo, Acipenser (Antaceus) Duméril [A. H. A.] 1867:175, Pl. 14 (figs. 1, 1a-b) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] Lake Erie, Buffalo, New York, U.S.A. Holotype (unique): MCZ (whereabouts unknown). Also appeared in Duméril 1870:231, pl. 19 (fig. 1) [ref. 1147]. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Smith 1986:47 [ref. 22186], Scott & Crossman 1998:89 [ref. 24570]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

carbonarius, Acipenser Agassiz [L.] 1850:271, Pl. 5 (figs. 1-3) [Lake Superior; ref. 66] Michipicotin, on northeastern shore of Lake Superior, North America. Holotype (unique): whereabouts unknown. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

caspicus, Huso huso Babushkin [N. Ya.] 1942:131 [Izvestiya Azerbaidzhankoy Nauchno-Issledovatelskoy Rybokhozyaistvennoi Stantsii. Baku No. 7; ref. 21746] Caspian Sea. No types known. •Synonym of Huso huso (Linnaeus 1758), but a valid subspecies as described -- (Lelek 1987:55 [ref. 22962], Esmaeili et al. 2018:7 [ref. 36089]). •Synonym of Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Coad 1995:7 [ref. 23608], Kottelat 1997:34 [ref. 22952], Esmaeili et al. 2017:26 [ref. 35254], Jouladeh-Roudbar et al. 2020:19 [ref. 37983], Çiçek et al. 2024:31 [ref. 40789]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

cataphractus, Acipenser Gray [J. E.] (ex Rapp) 1835:122 [Proceedings of the Zoological Society of London 1834 (pt 2); ref. 18155] Mississippi River, U.S.A. Possible holotype: BMNH 2004.12.8.3. The diagnosis was quoted from a manuscript by Rapp but the description was by Gray; authorship herein regarded as Gray (ex Rapp). •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

chatys, Acipenser baeri Dryagin [P. A.] 1948:532 [Zoologichesky Zhurnal v. 27 (no. 6); ref. 13007] From Lena to Kolyma rivers, Sakha-Yakutia, northeastern Russia. Syntypes: (27). •Synonym of Acipenser baerii Brandt 1869 -- (Kottelat 2006:15 [ref. 28831]). •Synonym of Acipenser baerii Brandt 1869, but a valid subspecies chatys as described -- (Sokolov 1998:20 [ref. 23571], Bogutskaya & Naseka 2004:23 [ref. 28183], Romanov et al. 2017:820 [ref. 35687], Jouladeh-Roudbar et al. 2020:13 [ref. 37983]). •Synonym of Huso baerii (Brandt 1869). Current status: Synonym of Huso baerii (Brandt 1869). Acipenseridae. Habitat: freshwater, brackish.

cincinnati, Acipenser (Antaceus) Duméril [A. H. A.] 1867:174, Pl. 14 (figs. 2, 2a-b) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] Cincinnati, Ohio, U.S.A. Holotype (unique): MCZ (whereabouts unknown). Also appeared in Duméril 1870:229 [ref. 1147]. •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

colchica, Acipenser gueldenstadti var. Marty [V. J.] 1940:869 [Zoologichesky Zhurnal v. 19 (no. 6); ref. 17607] Southeastern part of Black Sea near mouth of Rioni and Inguri rivers, Georgia, Eurasia. Syntypes: (many). •Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833, but a valid subspecies -- (Berg 1948:84 [ref. 12882], Svetovidov 1973:82 [ref. 7169], Lelek 1987:25 [ref. 22962], Ninua & Japoshvili 2008:164 [ref. 31251]). •Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952], see also Sokolov 1998:21 [ref. 23571]). •Synonym of Acipenser persicus Borodin 1897, but a valid subspecies -- (Reshetnikov et al. 1997:725 [ref. 24702]). •Synonym of Acipenser persicus Borodin 1897 -- (Bogutskaya & Naseka 2004:24 [ref. 28183]). •Valid as Acipenser colchicus Marty 1940 -- (Kottelat & Freyhof 2007:50 [ref. 29996], Çiçek et al. 2015:142 [ref. 35151], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:78 [ref. 37569], Dyldin et al. 2022:[9] [ref. 39193], Çiçek et al. 2023:328 [ref. 40625], Çiçek et al. 2024:27 [ref. 40789]). •Valid as Sterletus colchicus (Marty 1940) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso colchicus (Marty 1940) --(Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso colchicus (Marty 1940). Acipenseridae. Distribution: Eurasia: southeastern Black Sea basin and lower Danube River (Romania, Bulgaria, Turkey, Georgia). Habitat: freshwater.

copei, Acipenser (Huso) Duméril [A. H. A.] 1870:108 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Missouri River (?), U.S.A. Holotype (unique): MCZ 100696 [tracking no.] (not found). •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

curensis, Huso huso caspicus natio Babushkin [N. Ya.] 1942:131 [Izvestiya Azerbaidzhankoy Nauchno-Issledovatelskoy Rybokhozyaistvennoi Stantsii. Baku No. 7; ref. 21746] Infrasubspecific, not available; from Kura River, Caspian Sea basin. •In the synonymy of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952]). Infrasubspecific. Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

cyrensis, Acipenser stellatus stellatus natio Berg [L. S.] 1932:65 [Les poissons des eaux douces de l'U.R.S.S. Part 1; ref. 278] Not available, infrasubspecific; from Kura River, Azerbaijan. •In the synonymy of Acipenser stellatus Pallas 1771 -- (Berg 1948:100 [ref. 12882], Kottelat 1997:33 [ref. 22952]). •In the synonymy of Huso stellatus (Pallas 1771). Infrasubspecific. Current status: Synonym of Huso stellatus (Pallas 1771). Acipenseridae.

danubialis, Acipenser stellatus Brusina [S.] 1902:59, Fig. 3 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Danube River. Syntypes: whereabouts unknown. •Synonym of Acipenser stellatus Pallas 1771 -- (Svetovidov 1973:84 [ref. 7169], Kottelat 1997:33 [ref. 22952], Jouladeh-Roudbar et al. 2020:18 [ref. 37983]). •Synonym of Huso stellatus (Pallas 1771). Current status: Synonym of Huso stellatus (Pallas 1771). Acipenseridae. Habitat: freshwater, brackish, marine.

danubica, Acipenser gueldenstaedti colchicus natio Movchan [Yu. V.] 1967:31 [Vestnik Zoologii. Zoologichesky Institut Akademii Nauk Ukrainskoy SSR. Kiev v. 6; ref. 23081] Not available, infrasubspecific; from Danube R. •In the synonymy of Acipenser gueldenstaedtii (Brandt & Ratzeburg 1833) -- (Kottelat 1997:30 [ref. 22952], Bogutskaya & Naseka 2004:23 [ref. 28183]). •In the synonymy of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Infrasubspecific. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

dekayi, Acipenser (Huso) Duméril [A. H. A.] 1870:168 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] New York, U.S.A. Holotype (unique): MCZ 8924. •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Smith 1986:45 [ref. 22186], Hilton et al. 2011:11 [ref. 31407], Kynard et al. 2016:209 [ref. 35295]). •Synonym of Huso brevirostrum (Lesueur 1818). Current status: Synonym of Huso brevirostrum (Lesueur 1818). Acipenseridae. Habitat: freshwater, brackish, marine.

derjavini, Acipenser nudiventris Borzenko [M. P.] 1950 [Trudy Kaspiyskogo Basseinovogo Filiala VNIRO. Astrakhan No. 11; ref. 22959] Kura River, Azerbaijan, Caspian Sea Region. Syntypes: (127) KVNIRO uncat. •Synonym of Acipenser nudiventris Lovetsky 1828 -- (Coad 1995:7 [ref. 23608], Kottelat 1997:31 [ref. 22952], Jouladeh-Roudbar et al. 2020:15 [ref. 37983]). •Synonym of Huso nudiventris (Lovetsky 1828). Current status: Synonym of Huso nudiventris (Lovetsky 1828). Acipenseridae. Habitat: freshwater, brackish, marine.

donensis, Acipenser stellatus Lovetsky [A.] 1834:263, Pl. 19 (fig. 1) [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Don River, Russia. •Synonym of Acipenser stellatus Pallas 1771, but a valid subspecies as described -- (Sokolov 1998:19 [ref. 23571]). •Synonym of Acipenser stellatus Pallas 1771 -- (Berg 1948:96 [ref. 12882], Svetovidov 1973:83 [ref. 7169], Kottelat 1997:33 [ref. 22952], Parin et al. 2014:44 [ref. 33547], Jouladeh-Roudbar et al. 2020:18 [ref. 37983]). •Synonym of Huso stellatus (Pallas 1771). Current status: Synonym of Huso stellatus (Pallas 1771). Acipenseridae. Habitat: freshwater, brackish, marine.

dubius, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:276 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Not available, name only in synonymy of Acipenser gmelini Fitzinger 1836. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952] based on Brusina 1902). Nomen Nudum. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

erytraea, Acipenser ruthenus var. Antipa [G.] 1909:250, Pl. 31 [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable; from Rumania. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Infrasubspecific. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

fulvescens, Accipenser Rafinesque [C. S.] 1817:288 [American Monthly Magazine and Critical Review v. 1; ref. 19654] Lake Erie, North America. No types known. Original genus should have been Acipenser. The two subspecies names, acutirostris and obstusirostris, attributed to Roussow 1955:79 [ref. 26406] in Scott & Crossman 1998:89 [ref. 24570] were only mentioned as forms of Acipenser ruthenus Linnaeus 1758 (not of A. fulvescens) and are not available names. •Valid as Acipenser fulvescens Rafinesque 1817 -- (Lee et al. 1980:39 [ref. 22416], Smith 1986:45 [ref. 22186], Robison & Buchanan 1988:78 [ref. 23393], McAllister 1990:40 [ref. 14674], Tomelleri & Eberle 1990:11 [ref. 24089], Page & Burr 1991:26 [ref. 18983], Boschung 1992:28 [ref. 23239], Etnier & Starnes 1993:99 [ref. 22809], Artyukhin 1995:7 [ref. 23782], Chereshnev 1996:599 [ref. 24659], Stauffer et al. 1995:30 [ref. 23376], Cross & Collins 1995:21 [ref. 23394], Mettee et al. 1996:77 [ref. 25836], Bemis et al. 1997:37 [ref. 22871], Birstein & Bemis 1997:159 [ref. 29760], Scott & Crossman 1998:82 [ref. 24570], Fuller et al. 1999:22 [ref. 25838], Lyons et al. 2000:20 [ref. 26594], Ross et al. 2001:71 [ref. 25978], Nelson et al. 2004:58 [ref. 27807], Bailey et al. 2004:61 [ref. 27882], Boschung & Mayden 2004:102 [ref. 27995], Scharpf 2005:6 [ref. 28940], Page & Burr 2011:135 [ref. 31215], Hilton et al. 2011:136 [ref. 31407], Page et al. 2013:58 [ref. 32708], Afonso et al. 2016:13, 77 [ref. 36199], Dyldin et al. 2020:97 [ref. 37569], Bagley et al. 2023:312 [ref. 41241], Page et al. 2023:48 [ref. 40505]). •Valid as Sterletus fulvescens (Rafinesque 1817) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso fulvescens (Rafinesque 1817) -- (Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso fulvescens (Rafinesque 1817). Acipenseridae. Distribution: North America: Hudson Bay (Canada) eastward, south to east-central U.S.A.; introduced in Russia. Habitat: freshwater, brackish.

glaber, Acipenser Fitzinger [L. J. F. J.] (ex Marsilius) 1832:340, Pls. 25 (fig. 3), 28 (figs. 5-6) [Beiträge zur Landeskunde Österreichs unter der Enns, Wien v. 1; ref. 5019] Danube River, Austria. Syntypes: ?NMW 91292 (1, dry). Based on the ‘Huso IV, Sturio II’ or ‘Antaceus glaber‘ of Marsilius 1726:26, Pl. 2 (lower fig.) [ref. 42353]. Also appeared as new in Heckel (ex Fitzinger) in Fitzinger & Heckel 1836:270, Pls. 25 (fig. 3), 28 (figs. 5-6) [ref. 2077]. •Synonym of Acipenser nudiventris Lovetsky 1828 -- (Berg 1948:66 [ref. 12882], Svetovidov 1973:83 [ref. 7169], Kottelat 1997:31 [ref. 22952], Sokolov 1998:21 [ref. 23571], Bilecenoğlu et al. 2002:29 [ref. 26753], Jouladeh-Roudbar et al. 2020:15 [ref. 37983]). •Synonym of Huso nudiventris (Lovetsky 1828). Current status: Synonym of Huso nudiventris (Lovetsky 1828). Acipenseridae. Habitat: freshwater, brackish, marine.

gmelini, Acipenser Fitzinger [L. J. F. J.] in Fitzinger & Heckel 1836:276, Pls. 25 (fig. 2), 30(figs. 17-18) [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Azov Sea or Caspian Sea. Holotype (unique): NMW (not found). •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Çiçek et al. 2024:29 [ref. 40789]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

golis, Acipenser gueldenstaedtii var. Antipa [G.] 1909:261 [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Appeared as Acipenser Güldenstaedtii var. golis, from Black Sea south of Portitza, Rumania. Treated by Kottelat 1997 as infrasubspecific. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). •In the synonymy of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Infrasubspecific. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

grisescens, Acipenser ruthenus var. Brandt [J. F.] 1853:320, Fig. 2 [Mélanges Biologiques, tirés du Bulletin physico-mathématique de l'Académie Impériale des Sciences de St. Pétersbourg v. 1; ref. 20902] Nishni-Novgorod, Russia. No types known. Treated by Kottelat 1997:32 [ref. 22952] from Brandt 1851 as infrasubspecific. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Infrasubspecific. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater.

gueldenstaedtii, Acipenser Brandt [J. F.] & Ratzeburg [J. T. C.] 1833:13, Pl. 3 (figs. 2, 2A-E) [Medizinische Zoologie v. 2; ref. 619] Caspian Sea and tributaries; Black Sea. No types known. Originally as Güldenstädtii. •Valid as Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Berg 1948:78 [ref. 12882], Svetovidov 1973:82 [ref. 7169], Svetovidov in Whitehead et al. 1984:221 [ref. 13675] as gueldenstaedti, Lelek 1987:46 [ref. 22962], Coad 1995:6 [ref. 23608] as gueldenstaedti, Artyukhin 1995:7 [ref. 23782], Sokolov & Tsepkin 1996:18 [ref. 24640] as gueldenstaedti, Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:30 [ref. 22952], Reshetnikov et al. 1997:725 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760] with Brandt as author, Sokolov 1998:20 [ref. 23571], Coad 1998:102 [ref. 23869], Pourkazemi et al. 2000:1 [ref. 25536], Bogutskaya et al. 2001:42 [ref. 26178], Bilecenoğlu et al. 2002:28 [ref. 26753], Hanel 2003:46 [ref. 27894], Bogutskaya & Naseka 2004:23 [ref. 28183], Vassilev & Pehlivanov 2005:162 [ref. 28369] as gueldenstaedti with Brandt as author, Kottelat & Freyhof 2007:51 [ref. 29996], Vasil'eva 2007:37 [ref. 30517], Ninua & Japoshvili 2008:164 [ref. 31251], Esmaeili et al. 2010:365 [ref. 33391], Ruban et al. 2011:470 [ref. 31229], Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:41 [ref. 33547], Koerber & Litz 2014:2 [ref. 34967], Jouladeh-Roudbar et al. 2015:858 [ref. 34062], Barbieri et al. 2015:35 [ref. 35029], Çiçek et al. 2015:142 [ref. 35151], Koerber & Litz 2016:2 [ref. 35098], Nión et al. 2016:24 [ref. 35565], Esmaeili et al. 2017:25 [ref. 35254], Esmaeili et al. 2018:6 [ref. 36089], Ćaleta et al. 2019:143 [ref. 37026], Koerber et al. 2019:2 [ref. 36736], Lorenzoni et al. 2019:251 [ref. 37108], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:78 [ref. 37569], Iglésias et al. 2020:289 [ref. 37987], Jouladeh-Roudbar et al. 2020:14 [ref. 37983], Koerber et al. 2020:2 [ref. 37480], Kuljanishvili et al. 2020:[4] [ref. 37535], Mirande & Koerber 2020:2 [ref. 37594], Abliazov et al. 2021:8 [ref. 38576], Koerber et al. 2021:2 [ref. 38894], Dyldin et al. 2022:[9] [ref. 39193], Niță et al. 2022:22 [ref. 40471], Çiçek et al. 2023:5 [ref. 40616], Çiçek et al. 2023:328 [ref. 40625], Koerber et al. 2023:2 [ref. 40355], Loureiro et al. 2023:178 [ref. 40506], Nagy et al. 2023:356 [ref. 40348], Artüz & Fricke 2024:537 [ref. 41509], Çiçek et al. 2024:28 [ref. 40789]). •Valid as Sterletus gueldenstaedtii (Brandt & Ratzeburg 1833) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso gueldenstaedtii (Brandt & Ratzeburg 1833) -- (Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Distribution: Eastern Atlantic; Europe and Middle East: Basins of Sea of Marmara, Black Sea, Sea of Azov and Caspian Sea and adjacent watersheds. Introduced elsewhere. Habitat: freshwater, brackish, marine.

heckelii, Acipenser Fitzinger [L. J. F. J.] in Fitzinger & Heckel 1836:303, Pls. 26 (fig. 4), 29 (figs. 11-12) [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Adriatic Sea (Mediterranean Sea); rivers Po, Etsch [Adige] and Brenta, Italy. Syntypes: NMW 76784 (1), 92877 (1, dry). Name mentioned first in Brandt & Ratzeburg 1833:29 [ref. 619], not available. Name declared a nomen oblitum in Kottelat & Freyhof 2009:76 [ref. 30320] •Synonym of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:30 [ref. 22952], Kottelat & Freyhof 2009:77 [ref. 30320]). •Synonym of Huso naccarii (Bonaparte 1836). Nomen Oblitum. Current status: Synonym of Huso naccarii (Bonaparte 1836). Acipenseridae. Habitat: freshwater, brackish, marine.

helenae, Acipenser (Sterletus) Duméril [A. H. A.] (ex Valenciennes) 1870:258 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Russia. Syntypes: MNHN 0000-5176 (2). Type catalog: Bertin 1940:253 [ref. 293]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (authors). •Hybrid between Acipenser ruthenus x Acipenser gueldenstaedti -- (Kottelat 1997:183 [ref. 22952]). Hybrid. Current status: Synonym of Huso. Acipenseridae. Habitat: freshwater, brackish, marine.

helops, Acipenser Pallas [P. S.] 1814:97 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Major rivers and seas of Russia. No types known. •Synonym of Acipenser stellatus Pallas 1771 -- (Berg 1948:96 [ref. 12882] as hellops, Svetovidov 1973:83 [ref. 7169], Coad 1995:7 [ref. 23608], Kottelat 1997:32 [ref. 22952], Sokolov 1998:22 [ref. 23571], Parin et al. 2014:44 [ref. 33547], Jouladeh-Roudbar et al. 2020:18 [ref. 37983]). •Synonym of Huso stellatus (Pallas 1771). Current status: Synonym of Huso stellatus (Pallas 1771). Acipenseridae. Habitat: freshwater, brackish, marine.

honneymani, Acipenser (Huso) Duméril [A. H. A.] 1870:177 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Nouvelle-Ecosse, Canada. Holotype (unique): MNHN 0000-4843. Type catalog: Bertin 1940:252 [ref. 293]. •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

huso, Acipenser Linnaeus [C.] 1758:238 [Systema Naturae, Ed. X v. 1; ref. 2787] Danube and the rivers of Russia. No types known. •Valid as Acipenser huso Linnaeus 1758 -- (Vasil'eva et al. 2009:865 [ref. 30626], Parin et al. 2014:42 [ref. 33547]). •Valid as Sterletus huso (Linnaeus 1758) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Svetovidov 1973:84 [ref. 7169], Svetovidov in Whitehead et al. 1984:225 [ref. 13675], Lelek 1987:55 [ref. 22962], Coad 1995:7 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Sokolov & Tsepkin 1996:16 [ref. 24640], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:33 [ref. 22952], Birstein & Bemis 2007:159 [ref. 29760], Reshetnikov et al. 1997:726 [ref. 24702], Sokolov 1998:23 [ref. 23571], Coad 1998:102 [ref. 23869], Pourkazemi et al. 2000:1 [ref. 25536], Bogutskaya et al. 2001:42 [ref. 26178], Bilecenoğlu et al. 2002:30 [ref. 26753], Hanel 2003:46 [ref. 27894], Bogutskaya & Naseka 2004:26 [ref. 28183], Vassilev & Pehlivanov 2005:163 [ref. 28369], Hanel & Lusk 2005:174 [ref. 28804], Fricke et al. 2007:22 [ref. 29533], Kottelat & Freyhof 2007:59 [ref. 29996], Vasil'eva 2007:40 [ref. 30517], Fricke 2008:13 [ref. 30182], Ninua & Japoshvili 2008:164 [ref. 31251], Esmaeili et al. 2010:366 [ref. 33391], Lipej & Dulčić 2010:17 [ref. 36649], Hilton et al. 2011:136 [ref. 31407], Jouladeh-Roudbar et al. 2015:859 [ref. 34062], Barbieri et al. 2015:37 [ref. 35029], Çiçek et al. 2015:143 [ref. 35151], Nión et al. 2016:24 [ref. 35565], Esmaeili et al. 2017:25 [ref. 35254], Esmaeili et al. 2018:7 [ref. 36089], Ćaleta et al. 2019:145 [ref. 37026], Lorenzoni et al. 2019:251 [ref. 37108], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:79, 102 [ref. 37569], Jouladeh-Roudbar et al. 2020:18 [ref. 37983], Kovačić et al. 2020:10 [ref. 37519], Kuljanishvili et al. 2020:[4] [ref. 37535], Abliazov et al. 2021:8 [ref. 38576], Kovačić et al. 2021:18 [ref. 39014], Dyldin et al. 2022:[12] [ref. 39193], Niță et al. 2022:19 [ref. 40471], Çiçek et al. 2023:329 [ref. 40625], Shumka et al. 2023:38 [ref. 40747], Artüz & Fricke 2024:537 [ref. 41509], Çiçek et al. 2024:31 [ref. 40789], Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso huso (Linnaeus 1758). Acipenseridae. Distribution: Eastern Atlantic; Mediterranean Sea; Sea of Marmara; Black Sea; Sea of Azov; Caspian Sea. Introduced elsewhere. Habitat: freshwater, brackish, marine.

ichthyocolla, Acipenser Billberg [G. J.] 1833:52 [Linnéska Samfundets Handlingar v. 1 (for 1832); ref. 34146] Danube and the rivers of Russia. No types known. Unnecessary replacement name for "Huso Linn." [should read Acipenser huso Linnaeus 1758]; see Kullander 2016:113 [ref. 34147]. •Synonym of Huso huso (Linnaeus 1758)-- (Kullander 2016:113 [ref. 34147], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Replacement Name. Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

ichthyocolla, Huso Bonaparte [C. L.] 1846:22 [Atti della Settima Adunanza degli Scienziati Italiani Sesta Riunione, Milano 7a Adunanza, Napoli, Part 2; ref. 519] Unneeded new name for Acipenser huso Linnaeus 1758. •Synonym of Huso huso (Linnaeus 1758) -- (Svetovidov 1973:84 [ref. 7169], Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

illyricus, Acipenser stellatus Brusina [S.] 1902:60, Figs. 1-2 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Zadar, Dalmatia, Croatia, Adriatic Sea (Mediterranean Sea). Syntypes: whereabouts unknown. Original not seen. •Synonym of Acipenser stellatus Pallas 1771 -- (Svetovidov 1973:84 [ref. 7169], Kottelat 1997:33 [ref. 22952], Jouladeh-Roudbar et al. 2020:18 [ref. 37983]). •Synonym of Huso stellatus (Pallas 1771). Current status: Synonym of Huso stellatus (Pallas 1771). Acipenseridae. Habitat: freshwater, brackish, marine.

jeniscensis, Acipenser Herzenstein [S. M.] 1895:79 [Vestnik Rybopromyshlennosti. St.-Peterburg v. 10; ref. 22000] Turuchansk Dist, Russia. Original not seen; perhaps name only and not available. Berg 1911:204 [ref. 272] cites Herzenstein in litt. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952] as jenisensis). •In the synonymy of Huso ruthenus (Linnaeus 1758). Nomen Nudum. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

kamensis, Acipenser Lovetsky [A.] 1834:262, Pl. 16 (fig. 2) [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Kama River, Russia. No types known. evidently spelled camensis on Pl. 16; see Kottelat 1997:31 [ref. 22952]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

kankreni, Acipenser (Sterletus) Duméril [A. H. A.] (ex Valenciennes) 1870:256 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Probably Russia. Holotype (unique): MNHN 0000-5173. Type catalog: Bertin 1940:253 [ref. 293]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

kirtlandii, Acipenser (Huso) Duméril [A. H. A.] 1870:161 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Lake Erie, North America. Holotype (unique): MNHN 0000-3109 (mounted). Type catalog: Bertin 1940:252 [ref. 293]. •Synonym of Acipenser rubicundus Lesueur 1818 -- (authors). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

koster, Acipenser Gmelin [J. F.] 1789:1486 [Caroli a Linné ... Systema Naturae per regna tria naturae v. 1 (pt 3); ref. 18139] Caspian Sea. Appeared first as name only in Gmelin 1774:238 [ref. 18140, v. 3]. •Apparently the same as Acipenser kostera Fitzinger 1832. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Çiçek et al. 2024:29 [ref. 40789]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Uncertain as Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

kostera, Acipenser Fitzinger [L. J. F. J.] 1832:340 [Beiträge zur Landeskunde Österreichs unter der Enns, Wien v. 1; ref. 5019] Danube River, Vienna, Austria. Neotype: BMNH 1898.4.11.26. Neotype designated by Kottelat 1997:31 [ref. 22952]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

kurensis, Acipenser gueldenstaedti persicus natio Belyaeff [W. N.] 1932:68 [Byulleten Vsekaspiyskoi Rybokhozyaistvennoy Ekspeditsii, Baku 1932 (no. 5-6); ref. 23609] Not available, infrasubspecific; also described temporarily and with Russian name only; from Kura River. Possible subsequent usage of this name needs research. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Coad 1995:6 [ref. 23608]). •In the synonymy of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Infrasubspecific. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

ladanus, Acipenser Ninni [A. P.] (ex Chiereghini) 1872:33 [Rivista critica delle specie dei pesci adriatici descritti nell'opera manoscritta dell'Ab. Stefano Chiereghini di Chioggia.; ref. 17995] Appeared first in Nardo 1847:col. 111 [ref. 17944] as name in synonymy and not available. Probably made available by Ninni 1872:33 [ref. 17995] where Chiereghini manuscript is quoted and name is treated as valid by Ninni. •Synonym of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:31 [ref. 22952]). •Synonym of Huso naccarii (Bonaparte 1836). Current status: Synonym of Huso naccarii (Bonaparte 1836). Acipenseridae. Habitat: freshwater, brackish, marine.

laevis, Acipenser Agassiz [L.] 1850:267 [Lake Superior; ref. 66] The Pic, Lake Superior, North America. No types known. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

lamarii, Acipenser (Huso) Duméril [A. H. A.] 1870:139 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Mississippi River or Lake Erie, U.S.A. Holotype (unique): MNHN 0000-9115 (dry). Type catalog: Bertin 1940:251 [ref. 293]. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

lesueurii, Acipenser (Huso) Duméril [A. H. A.] (ex Valenciennes) 1870:166, Pl. 16 (figs. 1, 1a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] New York, U.S.A. Holotype (unique): MNHN 0000-3489. Type catalog: Bertin 1940:252 [ref. 293]. •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Smith 1986:45 [ref. 22186], Hilton et al. 2011:11 [ref. 31407], Kynard et al. 2016:209 [ref. 35295]). •Synonym of Huso brevirostrum (Lesueur 1818). Current status: Synonym of Huso brevirostrum (Lesueur 1818). Acipenseridae. Habitat: freshwater, brackish, marine.

leucotica, Acipenser ruthenus var. Brandt [J. F.] 1853:320, Fig. 1 [Mélanges Biologiques, tirés du Bulletin physico-mathématique de l'Académie Impériale des Sciences de St. Pétersbourg v. 1; ref. 20902] Nishnij-Novgorod, Russia. No types known. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific from Brandt 1851, available as above. •Questionably a synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

liopeltis, Acipenser Günther [A.] 1870:341 [Catalogue of the fishes in the British Museum v. 8; ref. 1995] Mississippi, U.S.A. Holotype (unique): BMNH 1855.6.10.1 (stuffed). •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

longirostris, Acipenser gueldenstaedtii var. Antipa [G.] 1909:262 [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Danube River; Black Sea. Original not seen. Treated by Kottelat as infrasubspecific. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). •In the synonymy of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Infrasubspecific. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

lovetzkyi, Acipenser (Sterletus) Duméril [A. H. A.] 1870:254 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Russia. Syntypes: MNHN 0000-5171 (2). Type catalog: Bertin 1940:253 [ref. 293]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

lutescens, Accipenser Rafinesque [C. S.] 1820:246 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Old continent. No types known. Also in Rafinesque 1820:79 [ref. 3592]. Name only, not available. Correct spelling of genus is Acipenser. •In the synonymy of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:30 [ref. 22952]). •In the synonymy of Huso naccarii (Bonaparte 1836). Nomen Nudum. Current status: Synonym of Huso naccarii (Bonaparte 1836). Acipenseridae.

macrophthalmus, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:298 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Not available, name only; also later as name in synonymy. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). •In the synonymy of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Nomen Nudum. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

macrostomus, Accipenser Rafinesque [C. S.] 1820:249 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Lower parts of the Ohio River, U.S.A. No types known. Described as belonging to subgenus Sterletus, but listed as above. Also in Rafinesque 1820:81 [ref. 3592]. Correct spelling of genus is Acipenser. •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

maculosus, Acipenser Lesueur [C. A.] 1818:393 [Transactions of the American Philosophical Society (New Series) v. 1 (art. 33); ref. 17515] Ohio River, U.S.A. Syntypes: ANSP (2). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Boschung & Mayden 2004:102 [ref. 27995]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

maeoticus, Acipenser Sal'nikov [N. I.] & Malyatskii [S. M.] 1934:44 [Trudy Nauchnoy Rybokhozyaistvennoy Biologicheskoy Stantii Gruzii v. 1 (no. 1); ref. 21745] Sea of Azov. No types known. •Synonym of Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Kottelat 1997:34 [ref. 22952], Birstein & Bemis 1997:159 [ref. 29760], see Sokolov 1998:23 [ref. 23571]). •Synonym of Huso huso (Linnaeus 1758), but a valid subspecies as described -- (Lelek 1987:55 [ref. 22962]). •Synonym of Acipenser huso Linnaeus 1758 -- (Parin et al. 2014:42 [ref. 33547], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

marsiglii, Acipenser Brandt [J. F.] in Brandt & Ratzeburg 1833:352 [Medizinische Zoologie v. 2; ref. 619] Danube River or Ob River. Holotype: ?ZIN 11825. Based on Antaceus glaber of Marsigli 1726:34, Pl. 10 (fig. 2) [not investigated]. Also spelled marsilii by authors. •Synonym of Acipenser ruthenus Linnaeus 1758, but perhaps a valid subspecies -- (Reshetnikov et al. 1997:726 [ref. 24702], Sokolov 1998:21 [ref. 23571]). •Synonym of Acipenser ruthenus Linnaeus 1758, but a valid subspecies marsiglii -- (Sheiko & Fedorov 2000:16 [ref. 25650]). •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Berg 1948:76 [ref. 12882], Kottelat 1997:31 [ref. 22952], Parin et al. 2014:44 [ref. 33547], Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Çiçek et al. 2024:29 [ref. 40789]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

measius, Acipenser Lesueur [C. A.] in Vaillant 1896:26 [12], Pl. 17 (unedited) [Bulletin de la Société philomathique de Paris (8th Série) v. 8 (no. 1); ref. 13482] No locality. On p. 12 of separate. •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Hilton et al. 2011:11 [ref. 31407]). •Synonym of Huso brevirostrum (Lesueur 1818). Current status: Synonym of Huso brevirostrum (Lesueur 1818). Acipenseridae.

medius, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:293 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Name in the synonymy of Acipenser schypa, not available; also appeared in later literature. •Questionably in the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). •Questionably in the synonymy of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Nomen Nudum. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

megalaspis, Acipenser (Huso) Duméril [A. H. A.] 1870:135 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Lake Champlain at Burlington, Vermont, U.S.A. Holotype (unique) (?): MCZ 8953. This name was misspelled as megalepis in earlier versions of the Catalog of Fishes. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Smith 1986:47 [ref. 22186], Scott & Crossman 1998:89 [ref. 24570]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

microrhynchus, Acipenser (Huso) Duméril [A. H. A.] 1870:164 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Port of New York, New York, U.S.A. Holotype (unique): MCZ (whereabouts unknown). •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Smith 1986:45 [ref. 22186], Hilton et al. 2011:11 [ref. 31407], Kynard et al. 2016:209 [ref. 35295]). •Synonym of Huso brevirostrum (Lesueur 1818). Current status: Synonym of Huso brevirostrum (Lesueur 1818). Acipenseridae. Habitat: freshwater, brackish, marine.

naccarii, Acipenser Bonaparte [C. L.] 1836:fasc. 16-17, punt.87, Pl. 129 (fig. 2) [Iconografia della fauna italica; ref. 4892] Rivers Brenta, Adige, Piave, Livenza, Bacchiglione, Tagliamento; Florence, Italy. Syntypes: ANSP 624 (1), 625 (1) Bonaparte no. 72. Type catalog: Böhlke 1984:17 [ref. 13621]. Name declared a nomen protectum by Kottelat & Freyhof 2009:76 [ref. 30320] to establish precedence over Acipenser heckelii Fitzinger 1836. •Valid as Acipenser naccarii Bonaparte 1836 -- (Svetovidov 1973:83 [ref. 7169], Svetovidov in Whitehead et al. 1984:222 [ref. 13675], Lelek 1987:25 [ref. 22962], Artyukhin 1995:7 [ref. 23782], Mrakovcic et al. 1995:183 [ref. 23079], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:30 [ref. 22952], Bogutskaya & Naseka 2004:24 [ref. 28183], Kottelat & Freyhof 2007:52 [ref. 29996], Kottelat & Freyhof 2009:76 [ref. 30320], Lipej & Dulčić 2010:16 [ref. 36649], Hilton et al. 2011:136 [ref. 31407], Ćaleta et al. 2015:45 [ref. 34877], Barbieri et al. 2015:35 [ref. 35029], Nión et al. 2016:24 [ref. 35565] as nacarii and date 1838, Ćaleta et al. 2019:143 [ref. 37026], Carneiro et al. 2019:55 [ref. 37250], Lorenzoni et al. 2019:251 [ref. 37108], Dyldin et al. 2020:97 [ref. 37569], Kovačić et al. 2020:9 [ref. 37519], Kovačić et al. 2021:18 [ref. 39014], Shumka et al. 2023:36 [ref. 40747]). •Valid as Sterletus naccarii (Bonaparte 1836) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso naccarii (Bonaparte 1836) -- (Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso naccarii (Bonaparte 1836). Acipenseridae. Distribution: Mediterranean Sea: Adriatic Sea and its tributaries, Italy, Slovenia, Greece (extinct), Croatia, Montenegro and Albania; adjacent northeastern Atlantic: Portugal (extinct); introduced in Russia. Habitat: freshwater, brackish, marine.

nardoi, Acipenser Heckel [J. J.] 1851:557, Pl. 24 (fig. 2) [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 7 (pt 2); ref. 18261] Venice, Italy, Adriatic Sea (Mediterranean Sea). Holotype (?): NMW 63076. Non-types: ?NMW 63079 (1). •Synonym of Acipenser naccarii Bonaparte 1836 -- (Svetovidov 1973:83 [ref. 7169], Kottelat 1997:31 [ref. 22952]). •Synonym of Huso naccarii (Bonaparte 1836). Current status: Synonym of Huso naccarii (Bonaparte 1836). Acipenseridae. Habitat: freshwater, brackish, marine.

nasus, Acipenser Heckel [J. J.] 1847:80 [Diario del Nono Congresso degli Scienziati Italiani convocati in Venezia; ref. 26437] Venice, Italy, Adriatic Sea (Mediterranean Sea). Holotype (unique): NMW 63093. Also appeared in Heckel 1851:552 [ref. 18261], Pl. 23. •Synonym of Acipenser naccarii Bonaparte 1836 -- (Svetovidov 1973:83 [ref. 7169], Kottelat 1997:31 [ref. 22952]). •Synonym of Huso naccarii (Bonaparte 1836). Current status: Synonym of Huso naccarii (Bonaparte 1836). Acipenseridae. Habitat: freshwater, brackish, marine.

nertinianus, Acipenser (Huso) Duméril [A. H. A.] 1870:162 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Homer, Michigan, U.S.A. Holotype (unique): MCZ 24032. •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

nudiventris, Acipenser Lovetsky [A.] 1828:78, Pl. 6 (fig. 2) [Novy Magazin Estestvennoy Istorii, Fiziki, Khimii i Svedeny Ekonomicheskikh, Izdanny I. Dvigubskim v. 1 (no. 2); ref. 19627] Aral Sea, Russia. No types known. Apparently also appeared in Lovetsky 1830 [ref. 18454]. Original description reproduced in Berg 1905:2, footnote [ref. 15338]. •Valid as Acipenser nudiventris Lovetsky 1828 -- (Berg 1948:66 [ref. 12882], Svetovidov 1973:83 [ref. 7169], Coad 1981:8 [ref. 22348], Svetovidov in Whitehead et al. 1984:222 [ref. 13675], Lelek 1987:48 [ref. 22962], Coad 1995:7 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Zhu 1995:6 [ref. 25213], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:31 [ref. 22952], Reshetnikov et al. 1997:725 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760], Sokolov 1998:21 [ref. 23571], Coad 1998:102 [ref. 23869], Pourkazemi et al. 2000:1 [ref. 25536], Bogutskaya et al. 2001:42 [ref. 26178], Zhang 2001:37 [ref. 26586] dated 1928 [sic], Bilecenoğlu et al. 2002:29 [ref. 26753], Hanel 2003:46 [ref. 27894], Bogutskaya & Naseka 2004:24 [ref. 28183], Vassilev & Pehlivanov 2005:162 [ref. 28369] with date as 1928, Fricke et al. 2007:21 [ref. 29533], Kottelat & Freyhof 2007:53 [ref. 29996], Vasil'eva 2007:38 [ref. 30517], Ninua & Japoshvili 2008:164 [ref. 31251], Esmaeili et al. 2010:365 [ref. 33391], Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:43 [ref. 33547], Çiçek et al. 2015:142 [ref. 35151], Zhang et al. 2016:45 [ref. 34477], Esmaeili et al. 2017:25 [ref. 35254], Esmaeili et al. 2018:6 [ref. 36089], Ćaleta et al. 2019:144 [ref. 37026], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:79, 102 [ref. 37569], Jouladeh-Roudbar et al. 2020:15 [ref. 37983], Kuljanishvili et al. 2020:[4] [ref. 37535], Dyldin et al. 2022:[10] [ref. 39193], Çiçek et al. 2023:8 [ref. 40326], Çiçek et al. 2023:329 [ref. 40625], Çiçek et al. 2024:28 [ref. 40789], Artaev et al. 2025:33 [ref. 42057]). •Valid as Sterletus nudiventris (Lovetsky 1828) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso nudiventris (Lovetsky 1828) -- (Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso nudiventris (Lovetsky 1828). Acipenseridae. Distribution: Eastern Atlantic, Europe and Middle East: Basins of Black, Azov, Caspian and Aral seas and Sea of Marmara. Habitat: freshwater, brackish, marine.

obensis, Acipenser baeri infra. Johansen [B. G.] 1945:1 [Tomskoe Otdelenie Moskovskago Obshchestva Ispytateley Priody. Tomsk No. 6; ref. 19603] Ob River, at 59.5°N, Russia. Syntypes: (21) not saved. Apparently infrasubspecific and not available. Infrasubspecific. Current status: Synonym of Huso. Acipenseridae.

obstusirostris, Acipenser ruthenus form Roussow [G.] 1955:79 [Annales de l'ACFAS v. 21 (Section 3, Biologie) (for 1953-1954); ref. 26406] Not available; infrasubspecific. •Wrongly treated as a subspecies of [in the synonymy of] Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Infrasubspecific. Current status: Synonym of Huso. Acipenseridae.

obtusirostra, Acipenser ruthenus var. Brusina [S.] 1902:66 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Original not seen. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable; from Una River, Croatia. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Infrasubspecific. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

obtusirostris, Acipenser Lovetsky [A.] 1834:257 [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Not available, name only. Name attributed to Le Sueur. •In the synonymy of Acipenser brevirostrum Lesueur 1818 -- (Hilton et al. 2011:11 [ref. 31407]). •In the synonymy of Huso brevirostrum (Lesueur 1818). Nomen Nudum. Current status: Synonym of Huso brevirostrum (Lesueur 1818). Acipenseridae.

occidentalis, Huso huso ponticus natio Sal'nikov [N. I.] & Malyatskii [S. M.] 1934:44 [Trudy Nauchnoy Rybokhozyaistvennoy Biologicheskoy Stantii Gruzii v. 1 (no. 1); ref. 21745] Not available, infrasubspecific; from w. part of the Black Sea. •In the synonymy of Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Kottelat 1997:34 [ref. 22952]). •Valid as Aciperser huso Linnaeus 1758 -- (Parin et al. 2014:42 [ref. 33547]). Infrasubspecific. Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae.

ohiensis, Accipenser Rafinesque [C. S.] 1820:248 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Ohio River, U.S.A. Described as belonging to subgenus Sterletus, but listed as above. Also in Rafinesque 1820:81 [ref. 3592]. Correct spelling of genus is Acipenser. •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

orientalis, Huso huso Lelek [A.] 1987:55 [The freshwater fishes of Europe. Threatened fishes of Europe v. 9; ref. 22962] Black Sea. Validates a name that first appeared as an infrasubspecific name; see Huso huso ponticus natio orientalis. But subjectively invalid; secondarily preoccupied in Huso by Acipenser orientalis Pallas 1814. •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Çiçek et al. 2024:31 [ref. 40789]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

orientalis, Huso huso ponticus natio Sal'nikov [N. I.] & Malyatskii [S. M.] 1934:44 [Trudy Nauchnoy Rybokhozyaistvennoy Biologicheskoy Stantii Gruzii v. 1 (no. 1); ref. 21745] Not available, infrasubspecific; from the Black Sea. •In the synonymy of Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Kottelat 1997:34 [ref. 22952]). •Treated as available from Lelek 1987:55 [ref. 22962] by reference to above. •In the synonymy of Acipenser huso Linnaeus 1758 -- (Parin et al. 2014:42 [ref. 33547] not available). Infrasubspecific. Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae.

paranasimos, Acipenser (Huso) Duméril [A. H. A.] 1870:124 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Huntsville, Alabama, U.S.A. Holotype (unique): MCZ 8948. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Boschung & Mayden 2004:102 [ref. 27995]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

persicus, Acipenser Borodin [N. A.] 1897:18, Figs. [Vestnik Rybopromyshlennosti. St.-Peterburg v. 12; ref. 19955] Ural River to Ural'sk, Kazakhstan; Kura River, Azerbijan; southern shore of Caspian Sea, Iran. Syntypes: (2 measured) none at ZIN. •Synonym of Acipenser gueldenstaedti Brandt & Ratzeberg 1833, but a valid subspecies -- (Berg 1948:81 [ref. 12882], Lelek 1987:50 [ref. 22962], see also Sokolov 1998:19 [ref. 23571], Ninua & Japoshvili 2008:164 [ref. 31251]). •Valid as Acipenser persicus Borodin 1897 -- (Coad 1995:7 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Bemis et al. 1997:37 [ref. 22871], Reshetnikov et al. 1997:726 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760], Coad 1998:102 [ref. 23869], Pourkazemi et al. 2000:1 [ref. 25536], Bogutskaya et al. 2001:42 [ref. 26178], Bogutskaya & Naseka 2004:24 [ref. 28183], Fricke et al. 2007:21 [ref. 29533], Kottelat & Freyhof 2007:55 [ref. 29996], Kottelat & Freyhof 2007:55 [ref. 29996], Vasil'eva 2007:38 [ref. 30517], Ruban et al. 2011:470 [ref. 31229], Esmaeili et al. 2010:365 [ref. 33391], Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:43 [ref. 33547], Jouladeh-Roudbar et al. 2015:858 [ref. 34062], Çiçek et al. 2015:143 [ref. 35151], Esmaeili et al. 2017:25 [ref. 35254], Esmaeili et al. 2018:7 [ref. 36089], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:79 [ref. 37569], Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Kaya et al. 2020:328 [ref. 37582], Kuljanishvili et al. 2020:[4] [ref. 37535], Dyldin et al. 2022:[10] [ref. 39193], Çiçek et al. 2024:29 [ref. 40789]). •Valid as Sterletus persicus (Borodin 1897) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso persicus (Borodin 1897) -- (Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso persicus (Borodin 1897). Acipenseridae. Distribution: Eastern Atlantic, Europe and Middle east: Caspian Sea and adjacent watersheds; introduced elsewhere. Habitat: freshwater, brackish.

platycephalus, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:304 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Name in the synonymy of Acipenser heckelii Fitzinger 1836, not available; also appeared in other literature as name only or name in synonymy. •In the synonymy of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:30 [ref. 22952]). •In the synonymy of Huso naccarii (Bonaparte 1836). Nomen Nudum. Current status: Synonym of Huso naccarii (Bonaparte 1836). Acipenseridae.

platyrhinus, Acipenser (Huso) Duméril [A. H. A.] 1870:154 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Mississippi River or Lake Erie, U.S.A. Holotype (unique): MNHN 0000-5007 (mounted). Type catalog: Bertin 1940:251 [ref. 293]. •Synonym of Acipenser rubicundus Lesueur 1818 -- (authors). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (authors). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

ponticus, Acipenser stellatus Movchan [Yu. V.] 1970:41 [Vestnik Zoologii. Zoologichesky Institut Akademii Nauk Ukrainskoy SSR. Kiev v. 1970 (no. 2); ref. 895] Northwestern Black Sea, including Danube and Dneiper rivers. Syntypes: (many) whereabouts unknown. •Synonym of Huso huso (Linnaeus 1758) -- (see Sokolov 1998:23 [ref. 23571]). •Synonym of Acipenser stellatus Pallas 1771 -- (Parin et al. 2014:45 [ref. 33547], Jouladeh-Roudbar et al. 2020:18 [ref. 37983]). •Synonym of Huso stellatus (Pallas 1771). Current status: Synonym of Huso stellatus (Pallas 1771). Acipenseridae. Habitat: freshwater, brackish, marine.

ponticus, Huso huso Sal'nikov [N. I.] & Malyatskii [S. M.] 1934:44 [Trudy Nauchnoy Rybokhozyaistvennoy Biologicheskoy Stantii Gruzii v. 1 (no. 1); ref. 21745] Black Sea. No types known. •Synonym of Aciperser huso Linnaeus 1758 -- (Parin et al. 2014:42 [ref. 33547]). •Synonym of Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983], Çiçek et al. 2024:31 [ref. 40789]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

primigenius, Acipenser Chalikov [B. G.] 1944:47 [Zoologichesky Zhurnal v. 23 (no. 1); ref. 13170] Northern Caspian Sea. No types known. •Hybrid of Acipenser ruthenus x Acipenser gueldenstaedti -- (Berg 1948:77 [ref. 12882], Kottelat 1997:183 [ref. 22952], Çiçek et al. 2024:29 [ref. 40789]). Hybrid. Current status: Synonym of Huso. Acipenseridae. Habitat: freshwater, brackish, marine.

pygmaeus, Acipenser Pallas [P. S.] 1814:102 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Major seas and rivers of Europe. No types known. For localities see Kottelat 1997:31 [ref. 22952]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952], Sokolov 1998:21 [ref. 23571], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

pygmaeus, Acipenser Reisinger [J.] 1830:93 [Specimen ichthyologiae sistens pisces aquarium dulcium Hungariae; ref. 18620] Danube River, Hungary. Objectively invalid; preoccupied by Acipenser pygmaeus Pallas 1814. •Synonym of Acipenser gueldenstaedtii Brant & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952], Jouladeh-Roudbar et al. 2020:14 [ref. 37983]). •Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). 1°Homonym. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

rafinesquii, Acipenser (Huso) Duméril [A. H. A.] 1870:143 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Ohio River, U.S.A. Holotype (unique): MCZ 8950. •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

ratzeburgii, Acipenser Brandt [J. F.] in Brandt & Ratzeburg 1833:351, 352, Pl. 1a (fig. 3) [Medizinische Zoologie v. 2; ref. 619] Caspian Sea at mouth of Emba River. Holotype: ZIN 11760. •Synonym of Acipenser stellatus Pallas 1771 -- (Coad 1995:7 [ref. 23608], Kottelat 1997:33 [ref. 22952], Jouladeh-Roudbar et al. 2020:18 [ref. 37983], Çiçek et al. 2024:30 [ref. 40789]). •Synonym of Huso stellatus (Pallas 1771). Current status: Synonym of Huso stellatus (Pallas 1771). Acipenseridae. Habitat: freshwater, brackish, marine.

rauchii, Acipenser (Huso) Duméril [A. H. A.] 1870:118 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Osage River, Missouri, U.S.A. Holotype (unique): MCZ 8946. •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

rhynchaeus, Acipenser Agassiz [L.] 1850:276 [Lake Superior; ref. 66] Sault Sainte Marie, Lake Superior, North America. Syntypes: whereabouts unknown. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

richardsonii, Acipenser (Huso) Duméril [A. H. A.] 1870:120 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Mississippi River, U.S.A. Holotype (unique): MNHN 0000-9113 (dry). Type catalog: Bertin 1940:250 [ref. 293]. •Synonym of Acipenser rubicundus Lesueur 1818 -- (authors). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (authors). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

rosarium, Acipenser (Huso) Duméril [A. H. A.] 1870:152, Pl. 17 (figs. 2, 2a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Mississippi River or Lake Erie, U.S.A. Holotype (unique): MNHN 0000-5009 (dry). Type catalog: Bertin 1940:251 [ref. 293]. •Synonym of Acipenser rubicundus Lesueur 1818 -- (authors). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

rostellum, Acipenser (Huso) Duméril [A. H. A.] 1870:173, Pl. 16 (figs. 3, 3a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Probably New York, U.S.A. Holotype (unique): MNHN 0000-3490. Type catalog: Bertin 1940:252 [ref. 293]. •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Smith 1986:45 [ref. 22186], Hilton et al. 2011:11 [ref. 31407], Kynard et al. 2016:209 [ref. 35295]). •Synonym of Huso brevirostrum (Lesueur 1818). Current status: Synonym of Huso brevirostrum (Lesueur 1818). Acipenseridae. Habitat: freshwater, brackish, marine.

rostratus, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:287, 298 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Treated by Kottelat as dating to Brandt & Ratzeburg 1833, as name in synonymy and not available. •In the synonymy of Acipenser stellatus Pallas 1771 -- (Kottelat 1997:33 [ref. 22952]). •In the synonymy of Huso stellatus (Pallas 1771). Current status: Synonym of Huso stellatus (Pallas 1771). Acipenseridae. Habitat: freshwater, brackish, marine.

rostratus, Acipenser Brandt [J. F.] & Ratzeburg [J. T. C.] 1833:29 [Medizinische Zoologie v. 2; ref. 619] No description, not available. •In the synonymy of Acipenser stellatus Pallas 1771 -- (Kottelat 1997:33 [ref. 22952]). •In the synonymy of Huso stellatus (Pallas 1771). Nomen Nudum. Current status: Synonym of Huso stellatus (Pallas 1771). Acipenseridae. Habitat: freshwater, brackish, marine.

rubicundus, Acipenser Lesueur [C. A.] 1818:388, Pl. 12 [Transactions of the American Philosophical Society (New Series) v. 1 (art. 33); ref. 17515] Lakes Ontario, Erie, Huron and Michigan, North America. No types known. Redescribed and illustrated by Lesueur 1827:9, Pl. 5 [ref. 17524] with genus as Accipenser. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Smith 1986:47 [ref. 22186], Scott & Crossman 1998:89 [ref. 24570], Boschung & Mayden 2004:102 [ref. 27995]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

rupertianus, Acipenser Richardson [J.] 1836:311, Pl. 97 (fig. 1) [Fauna Boreali-Americana Part 3; ref. 3731] Albany River, Prince Rupert's Land, Canada. Syntypes: (2) whereabouts unknown •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

ruthenicus, Acipenser Brusina [S.] 1902:63 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Original not seen. Not available, name in synonymy. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Nomen Nudum. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

ruthenus, Acipenser Linnaeus [C.] 1758:237 [Systema Naturae, Ed. X v. 1; ref. 2787] ?Danube River. Holotype: NRM 96. Based on several sources, see Kottelat 1997:31 [ref. 22952] so 96 should be regarded as a syntype. Apparently ruthenicus Brusina 1902:63 is a misspelling. Species epithet spelled rhutenus by Kielsen 1835:iii [ref. 30365]. •Valid as Acipenser ruthenus Linnaeus 1758 -- (Herrera 1896:16 [ref. 39336], Berg 1948:70 [ref. 12882], Lelek 1987:51 [ref. 22962], Coad 1995:7 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Zhu 1995:6 [ref. 25213], Sokolov & Tsepkin 1996:23 [ref. 24640], Chereshnev 1996:599 [ref. 24659], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:31 [ref. 22952], Reshetnikov et al. 1997:726 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760], Sokolov 1998:21 [ref. 23571], Bogutskaya et al. 2001:42 [ref. 26178], Zhang 2001:29 [ref. 26586], Hanel 2003:46 [ref. 27894], Bogutskaya & Naseka 2004:24 [ref. 28183], Hanel & Lusk 2005:176 [ref. 28804], Fricke et al. 2007:21 [ref. 29533], Kottelat & Freyhof 2007:55 [ref. 29996], Esmaeili et al. 2010:365 [ref. 33391], Mecklenburg et al. 2011:117 [ref. 31212], Ruban et al. 2011:471 [ref. 31229], Hilton et al. 2011:136 [ref. 31407], Dolgov 2013:915 [ref. 33112], Parin et al. 2014:44 [ref. 33547], Litz & Koerber 2014:5 [ref. 33622], Jouladeh-Roudbar et al. 2015:858 [ref. 34062], Çiçek et al. 2015:143 [ref. 35151], Zhang et al. 2016:45 [ref. 34477], Nión et al. 2016:24 [ref. 35565], Esmaeili et al. 2017:25 [ref. 35254], Romanov et al. 2017:820 [ref. 35687], Dolgov et al. 2018:36 [ref. 41055], Esmaeili et al. 2018:7 [ref. 36089], Ćaleta et al. 2019:144 [ref. 37026], Lorenzoni et al. 2019:251 [ref. 37108], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:102 [ref. 37569], Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Dyldin et al. 2022:[11] [ref. 39193], Pozdeev et al. 2022:4 [ref. 39511], Nagy et al. 2023:356 [ref. 40348], Artüz & Fricke 2024:537 [ref. 41509], Çiçek et al. 2024:29 [ref. 40789], Semushin et al. 2025:5 [ref. 42082]). •Valid as Sterletus ruthenus (Linnaeus 1758) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso ruthenus (Linnaeus 1758) -- (Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso ruthenus (Linnaeus 1758). Acipenseridae. Distribution: Arctic rivers; Europe and Middle East: Sea of Marmara, Black Sea, Sea of Azov, White Sea and Caspian Sea watersheds. Introduced elsewhere. Habitat: freshwater, brackish.

rutzskyi, Acipenser ruthenus Johansen [B. G.] 1946:171 [Trudy Tomskogo Gosudarstvennogo Universiteta v. 97; ref. 19607] Upper Ob River, Siberia, Russia. Syntypes: (21). •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952] as ruzskyi, Sokolov 1998:21 [ref. 23571] as ruzskyi, Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

schipa, Acipenser Lovetsky [A.] 1834:260, Pl. 17 (figs. 3-4) [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Possibly the same as Acipenser schypa Gmelin 1789. Current status: Uncertain. Acipenseridae.

schypa, Acipenser Gmelin [J. F.] 1789:1484 [Caroli a Linné ... Systema Naturae per regna tria naturae v. 1 (pt 3); ref. 18139] Turkey, Bosphore or Sea of Marmara (Mediterranean Sea). Neotype: NRM 8946. Neotype designated by Kottelat 1997:34 [ref. 22952]. Based in part on Acipenser schypa of Güldenstädt 1772:533 [ref. 5066], and on Acipenser kostera of Gmelin 1774:238 [ref. 18140, v. 3]. Objectively invalid; preoccupied by Acipenser schypa Bonnaterre 1788. •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983], Çiçek et al. 2024:31 [ref. 40789]). 1°Homonym. Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

schypa, Acipenser Bonnaterre [J. P.] (ex Güldenstädt) 1788:16 [Tableau encyclopédique et méthodique des trois règnes de la nature... Ichthyologie; ref. 4940] 'La mer du Nord' (erroneous, is probably Caspian Sea). No type known. Neotype designated (NRM 8946) by Kottelat 1997:34 [ref. 22952] is invalid, as the neotype is a specimen of Huso huso (Linnaeus 1758), but Bonnaterre's Acipenser schypa was exclusively based on Acipenser schypa of Güldenstädt 1772:533 [ref. 5066], which is in the synonymy of Acipenser nudiventris Lovetsky 1828 according to Kottelat 1997:31 [ref. 22952]; therefore ICZN Art. 75.3.5 is not met. Name not considered as valid after 1899; therefore reversal of priority in favor of Acipenser nudiventris Lovetsky 1828 is followed (Art. 23.9). •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:15 [ref. 37983]). •Synonym of Huso nudiventris (Lovetsky 1828). Nomen Oblitum. Current status: Synonym of Huso nudiventris (Lovetsky 1828). Acipenseridae. Habitat: freshwater, brackish, marine.

schypa, Acipenser Güldenstädt [J. A. von] 1772:533 [Novi Commentarii Academiae Scientiarum Imperialis Petropolitanae v. 16 (for 1771); ref. 5066] Not available, non-binominal, see Kottelat 1997:31 [ref. 22952]. Name made available by Bonnaterre 1788:16 [ref. 4940]. Also seen as Acipenser schipa Güldenstädt 1772. •In the synonymy of Acipenser nudiventris Lovetsky 1828 -- (Kottelat 1997:31 [ref. 22952], Parin et al. 2014:43 [ref. 33547]). •In the synonymy of Huso nudiventris (Lovetsky 1828). Current status: Synonym of Huso nudiventris (Lovetsky 1828). Acipenseridae.

schypa, Acipenser Eichwald [C. E. von] 1831:66 [Zoologia specialis quam expositis animalibus tum vivis Pars posterior [3]; ref. 5562] Caspian Sea, unde Volga adscendit et Cyrum. Credited to "L." [Linnaeus] but this species was not described by Linnaeus; if regarded as available then it is invalid -- preoccupied by Acipenser schypa Bonnaterre 1788. •Synonym of Acipenser nudiventris Lovetsky 1828 -- (Svetovidov 1973:83 [ref. 7169], Coad 1995:7 [ref. 23608] as shypa, Jouladeh-Roudbar et al. 2020:15 [ref. 37983]). •Synonym of Huso nudiventris (Lovetsky 1828). 1°Homonym. Current status: Synonym of Huso nudiventris (Lovetsky 1828). Acipenseridae. Habitat: freshwater, brackish, marine.

scobar, Acipense gueldenstaedtii var. Antipa [G.] 1909:260 [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Danube River. Appeared as Acipense Güldenstaedtii var. scobar. The original genus should have been Acipenser. Treated by Kottelat 1997 as infrasubspecific and not available. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952] as scobar). •In the synonymy of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Infrasubspecific. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

septemcarinata, Acipenser ruthenus var. Brusina [S.] 1902:66 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Original not seen. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable; from Una River, Croatia. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Infrasubspecific. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

serotimus, Accipenser Rafinesque [C. S.] 1820:248 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Ohio and Kentucky rivers, U.S.A. Described as belonging to subgenus Sterletus, but listed as above. Also in Rafinesque 1820:80 [ref. 3592]. Correct spelling of genus is Acipenser. •Synonym of Acipenser fulvescens Rafinesque 1817. •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.

seuruga, Acipenser Güldenstädt [J. A. von] 1772:533 [Novi Commentarii Academiae Scientiarum Imperialis Petropolitanae v. 16 (for 1771); ref. 5066] Caspian Sea. No types known. Not available, non-binominal. Also in Bonnaterre 1788:17 [ref. 4940]. •In the synonymy of Acipenser stellatus Pallas 1771 -- (Kottelat 1997:32 [ref. 22952], Sokolov 1998:22 [ref. 23571], Parin et al. 2014:44 [ref. 33547], Jouladeh-Roudbar et al. 2020:18 [ref. 37983], Çiçek et al. 2024:30 [ref. 40789]). •In the synonymy of Huso stellatus (Pallas 1771). Current status: Synonym of Huso stellatus (Pallas 1771). Acipenseridae.

shyp, Acipenser Forster [J. R.] 1767:353 [Philosophical Transactions of the Royal Society of London v. 57 (art. 33); ref. 18088] Turkey, Bosphore or Sea of Marmara (Mediterranean Sea). Neotype: NRM 8946. Originally described from Volga River, Russia. Neotype designated by Kottelat 1997:34 [ref. 22952]. •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983], Çiçek et al. 2024:31 [ref. 40789]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

sibiricus, Sterledus ruthenus var. Dybowski [B. N.] 1874:394 [Verhandlungen der K.-K. zoologisch-botanischen Gesellschaft in Wien v. 24 (no. 3-4); ref. 1172] Middle and lower Angara River, Siberia, Russia. Syntypes: whereabouts unknown. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.

simus, Acipenser (Huso) Duméril [A. H. A.] (ex Valenciennes) 1870:175, Pl. 16 (figs. 2, 2a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] North America. Holotype (unique): MNHN 0000-3491. Type catalog: Bertin 1940:252 [ref. 293]. •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Smith 1986:45 [ref. 22186], Hilton et al. 2011:11 [ref. 31407] as Valenciennes in Duméril, Kynard et al. 2016:209 [ref. 35295]). •Synonym of Huso brevirostrum (Lesueur 1818). Current status: Synonym of Huso brevirostrum (Lesueur 1818). Acipenseridae. Habitat: freshwater, brackish, marine.

stellatus, Acipenser Pallas [P. S.] 1771:460 [Reise durch verschiedene Provinzen des russischen Reiches; ref. 18509] Ascending [northern] rivers from Caspain Sea (Russia). No types known. •Valid as Acipenser stellatus Pallas 1771 -- (Berg 1948:96 [ref. 12882], Svetovidov 1973:83 [ref. 7169], Svetovidov in Whitehead et al. 1984:223 [ref. 13675], Lelek 1987:54 [ref. 22962], Coad 1995:7 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Sokolov & Tsepkin 1996:20 [ref. 24640], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:32 [ref. 22952], Reshetnikov et al. 1997:726 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760], Sokolov 1998:22 [ref. 23571], Coad 1998:102 [ref. 23869], Pourkazemi et al. 2000:1 [ref. 25536], Bogutskaya et al. 2001:42 [ref. 26178], Bilecenoğlu et al. 2002:29 [ref. 26753], Hanel 2003:47 [ref. 27894], Bogutskaya & Naseka 2004:25 [ref. 28183], Vassilev & Pehlivanov 2005:162 [ref. 28369], Fricke et al. 2007:22 [ref. 29533], Kottelat & Freyhof 2007:56 [ref. 29996], Vasil'eva 2007:39 [ref. 30517], Ninua & Japoshvili 2008:164 [ref. 31251], Esmaeili et al. 2010:365 [ref. 33391], Lipej & Dulčić 2010:16 [ref. 36649], Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:44 [ref. 33547], Jouladeh-Roudbar et al. 2015:859 [ref. 34062], Barbieri et al. 2015:36 [ref. 35029], Çiçek et al. 2015:143 [ref. 35151], Esmaeili et al. 2017:25 [ref. 35254], Esmaeili et al. 2018:7 [ref. 36089], Ćaleta et al. 2019:144 [ref. 37026], Lorenzoni et al. 2019:251 [ref. 37108], Kovačić et al. 2020:9 [ref. 37519], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:79, 103 [ref. 37569], Jouladeh-Roudbar et al. 2020:18 [ref. 37983], Kuljanishvili et al. 2020:[4] [ref. 37535], Abliazov et al. 2021:8 [ref. 38576], Kovačić et al. 2021:18 [ref. 39014], Dyldin et al. 2022:[11] [ref. 39193], Niță et al. 2022:25 [ref. 40471], Çiçek et al. 2023:329 [ref. 40625], Artüz & Fricke 2024:537 [ref. 41509], Çiçek et al. 2024:30 [ref. 40789]). •Valid as Sterletus stellatus (Pallas 1771) -- (Kottelat & Freyhof 2025:546 [ref. 42352]). •Valid as Huso stellatus (Pallas 1771) -- (Brownstein & Near 2025:14 [ref. 42105]). Current status: Valid as Huso stellatus (Pallas 1771). Acipenseridae. Distribution: Eastern Atlantic; Mediterranean Sea; Sea of Marmara; Black Sea; Caspian Sea. Habitat: freshwater, brackish, marine.

stenorrhynchus, Acipenser Nikolskii [A. M.] 1896:400 [Ezhegodnik Zoologicheskogo Muzeya Imperatorskoy Akademii Nauk v. 1; ref. 14614] Large rivers of Siberia flowing to the Arctic. Syntypes: ZIN 10641 (2), 10885 (1), 10888 (1). ZISP 10641 also type of variety baicalensis. •Synonym of Acipenser baerii Brandt 1869 -- (Berg 1948:86 [ref. 12882], Kottelat 2006:15 [ref. 28831]). •Synonym of Acipenser baerii Brandt 1869, but a valid subspecies stenorrhynchus Nikolskii 1896 -- (Chereshnev 1996:599 [ref. 24659] as stenorhynchus, Chereshnev et al. 2001:32 [ref. 26736] as stenorhynchus, Reshetnikov 1997:725 [ref. 24702], Sokolov 1998:19 [ref. 23571], Bogutskaya & Naseka 2004:23 [ref. 28183], Ocock et al. 2006:26 [ref. 28933], Parin et al. 2014:40 [ref. 33547], Romanov et al. 2017:820 [ref. 35687], Jouladeh-Roudbar et al. 2020:13 [ref. 37983]). •Synonym of Huso baerii (Brandt 1869). Current status: Synonym of Huso baerii (Brandt 1869). Acipenseridae. Habitat: freshwater, brackish.

sterlet, Acipenser Brusina [S.] 1902:63 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Original not seen. Not available, name in synonymy. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Nomen Nudum. Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

sterleta, Acipenser Güldenstädt [J. A. von] 1772:533 [Novi Commentarii Academiae Scientiarum Imperialis Petropolitanae v. 16 (for 1771); ref. 5066] Not available, non-binominal. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952]). •In the synonymy of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae.

sturionaster, Acipenser Brusina [S.] 1902:52 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Original not seen. Name in synonymy, not available. •In the synonymy of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:31 [ref. 22952]). •In the synonymy of Huso naccarii (Bonaparte 1836). Nomen Nudum. Current status: Synonym of Huso naccarii (Bonaparte 1836). Acipenseridae.

sturionellus, Acipenser Nardo [G. D.] 1860:71 [Prospetti sistematici degli animali delle provincie Venete et del mare Adriatico; ref. 18470] Name only, in synonymy; not available. •In the synonymy of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:31 [ref. 22952]). •In the synonymy of Huso naccarii (Bonaparte 1836). Nomen Nudum. Current status: Synonym of Huso naccarii (Bonaparte 1836). Acipenseridae.

tanaica, Acipenser gueldenstadti var. Marty [V. J.] 1940:863 [Zoologichesky Zhurnal v. 19 (no. 6); ref. 17607] Taganrog Bay, Sea of Azov, Russia. Syntypes: (many). Bogutskaya & Naseka 2004:23 [ref. 28183] date tanaica to Movchan 1927 as a natio (needs research). •Synonym of Acipenser gueldenstaedti Brandt & Ratzeburg 1833, subspecies cochicus Marty 1940 -- (Berg 1948:84 [ref. 12882], Svetovidov 1973:83 [ref. 7169]). •Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952], Bogutskaya & Naseka 2004:23 [ref. 28183], Jouladeh-Roudbar et al. 2020:14 [ref. 37983]). •Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

tuecka, Acipenser Fitzinger [L. J. F. J.] & Heckel [J. J.] 1836:293 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Originally as Tücka. Name in the synonymy of Acipenser schypa, not available. Also occurred in later literature as name only. •Questionably in the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). •Questionably in the synonymy of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Nomen Nudum. Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.

turritus, Acipenser Fitzinger [L. J. F. J.] & Heckel [J. J.] 1836:270 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Museum label name in the synonymy of Acipenser glaber, not available. Also appeared in Brusina 1902:61 [ref. 17292] as name in synonymy. •In the synonymy of Acipenser nudiventris Lovetsky 1828 -- (Kottelat 1997:31 [ref. 22952]). •In the synonymy of Huso nudiventris (Lovetsky 1828). Nomen Nudum. Current status: Synonym of Huso nudiventris (Lovetsky 1828). Acipenseridae.

vallisnerii, Acipenser Molin [R.] 1853:366, 371 [Rivista Periodica dei Lavori della I. R. Accademia di Scienze, Lettere ed Arti di Padova v. 1; ref. 17782] Po River, Italy. •Synonym of Huso huso (Linnaeus 1758) -- (Svetovidov 1973:84 [ref. 7169], Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.